L-Cysteine CAS: 52-90-4 98-101% Dawb crystalline hmoov
| Catalog Number | xwm 90321 |
| Khoom npe | L-cysteine |
| CAS | 52-90-4 ib |
| Molecular Formula | HSCH2CH(NH2)CO2H |
| Molecular Luj | 121.16 Nws |
| Cov ntaub ntawv khaws cia | 2 txog 8 ° C |
| Harmonized tariff Code | 29309013 ib |
Khoom Specification
| Qhov tshwm sim | Dawb crystalline hmoov |
| Assay | 98.0% - 101.0% |
| Kev sib hloov tshwj xeeb | +8.3° ~ +9.5° |
| pH | 4.5 ~ 5.5 hli |
| SO4 | 0.03% max |
| Fe | 10 ppm max |
| Poob rau ziab | 0.5% max |
| Residue ntawm Ignition | 0.1% max |
| NH4 | 0.02% max |
| UAS 2O3 | 1 ppm max |
| Cl | ≤ 0.2% |
| Cov hlau hnyav (raws li Pb) | 10 ppm max |
| Lub Xeev Txoj Cai | 95.0% min |
Iron-sulfur pawg ua haujlwm ua cov cofactors ntawm ntau cov proteins, nrog ntau lub luag haujlwm molecular hauv ob lub hlwb prokaryotic thiab eukaryotic.Dedicated machineries sib sau ua ke cov pawg thiab xa lawv mus rau qhov kawg txais molecules hauv cov txheej txheem nruj nruj.Nyob rau hauv prototypical Gram-negative kab mob Escherichia coli, ob qhov uas twb muaj lawm hlau-sulfur pawg ua ke, hlau-sulfur pawg (ISC) thiab leej faj assimilation (SUF) txoj kev, yog nyob ze sib txuas.ISC txoj kev tswj hwm, IscR, yog ib qho kev hloov pauv ntawm helix-tig-helix hom uas tuaj yeem koom ua ke [2Fe-2S] pawg.Redox tej yam kev mob thiab hlau los yog sulfur muaj nyob rau hauv modulate ligation txheej xwm ntawm lub labile IscR pawg, uas nyob rau hauv lem txiav txim ib tug hloov nyob rau hauv DNA ib theem zuj zus ntawm cov regulator: pawg-muaj IscR tuaj yeem khi rau tsev neeg ntawm cov neeg txhawb nqa gene (hom-1) whereas lub clusterless daim ntawv lees paub tsuas yog pab pawg thib ob ntawm cov kab ke (hom-2).Txawm li cas los xij, hlau-sulfur pawg biogenesis hauv Gram-posi tive kab mob tsis zoo li tus yam ntxwv, thiab cov kab mob feem ntau ntawm cov pab pawg no tsuas yog ib qho ntawm cov hlau-sulfur pawg sib dhos.Ib qho tshwj xeeb tshwj xeeb yog qhov tshwj xeeb Gram-positive dissimilatory hlau txo cov kab mob Thermincola potens, qhov twg cov noob los ntawm ob lub tshuab tuaj yeem raug txheeb xyuas, txawm tias nrog lub koom haum sib txawv los ntawm cov kab mob Gram-negative.Peb pom tau hais tias ib qho ntawm cov noob no encodes ib qho kev ua haujlwm IscR homolog thiab muaj feem cuam tshuam rau kev tswj hwm ntawm cov hlau-sulfur pawg biogenesis hauv T. potens.Cov qauv thiab biochemical tus yam ntxwv ntawm T. potens thiab E. coli IscR tau nthuav tawm cov qauv zoo sib xws thiab nthuav tawm qhov kev txuag tsis tau pom dua ntawm cov txheej txheem tshwj xeeb ntawm kev sib cais ntawm cov yam ntxwv ntawm pawg neeg sib txawv ntawm cov tswj hwm kev hloov pauv.
